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Business Combination Schedule of Business Acquisitions, by Acquisition (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2018 | Feb. 15, 2017
Business Acquisition [Line Items] |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 26.6 |  |  |
Assets acquired: |  |  |  |  |  |
Receivables |  |  |  |  | $ 6.9 | $ 3.0
Inventories |  |  |  |  | 17.0 | 5.8
Other current assets |  |  |  |  | 0.2 | 0.2
Property, plant and equipment |  |  |  |  | 8.4 | 1.0
Other non-current assets |  |  |  |  | 1.7 |
Customer relationships and other identifiable intangible assets |  |  |  |  |  | 11.4
Goodwill | $ 95.7 | $ 12.1 |  |  |  | 7.2
Goodwill |  |  |  |  | 80.1 |
Tradenames |  |  |  |  | 4.6 |
Accounts payable and other current liabilities |  |  |  |  | (5.5) | (0.7)
Other current liabilities |  |  |  |  | (2.9) | (0.4)
Current and long term debt |  |  |  |  |  | 0.1
Deferred income tax liability |  |  |  |  | (11.2) |
Other non-current liabilities |  |  |  |  | (1.7) |
Consideration paid |  |  |  |  | 140.7 |
Repayment of Krausz debt | 13.2 | $ 0.0 | $ 0.0 |  |  |
Consideration paid considered as net cash used in investing | $ 127.5 |  |  |  |  |
Deferred income tax liability |  |  |  |  |  | $ 0.8
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period |  |  |  | $ 15.0 |  |
Patents [Member] |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |
Patents |  |  |  |  | 32.1 |
Customer-Related Intangible Assets [Member] |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |
Patents |  |  |  |  | 8.7 |
Above Market Leases [Member] |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |
Patents |  |  |  |  | $ 2.3 |

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